Southwire N-400400 Galvanized Steel Conduit Nipple 4x4 in

Product Description

The SOUTHWIRE N-400400 is a galvanized steel conduit nipple designed to extend a run of threaded rigid or IMC conduit. At 4 inches in trade size with a 4-inch length, this close nipple provides a secure, low-profile connection between conduit sections or fittings. The galvanized steel construction delivers high corrosion resistance and low conductivity, making it suitable for demanding electrical installations. Licensed electricians and electrical contractors install this fitting as part of rigid metal conduit (RMC) or intermediate metal conduit (IMC) systems in commercial and industrial applications.

This conduit nipple is used wherever a short, threaded extension is needed between conduit bodies, enclosures, panels, or junction boxes. The 4-inch by 4-inch dimension makes it a standard trade-size fitting suited to high-capacity conduit runs. Typical install scenarios include service entrances, panel extensions, and conduit-to-enclosure transitions in both new construction and retrofit work. The fitting is UL listed, meeting the compliance requirements common to commercial and industrial electrical projects.

Key Features

• Galvanized steel construction provides high corrosion resistance for long service life
• Low conductivity material suitable for rigid and IMC conduit systems
• Threaded ends ensure secure, code-compliant connections
• UL listed for use in commercial and industrial electrical installations
• 4-inch trade size accommodates high-capacity conduit runs

Compatibility

Designed as an OEM-style replacement and standard trade fitting for use with 4-inch threaded rigid metal conduit (RMC) and intermediate metal conduit (IMC) systems.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out all circuits before working on or near any conduit system. Use appropriate pipe wrenches or conduit tools to thread and tighten the nipple securely without over-stressing the fitting. Inspect threads on both the nipple and mating conduit or fitting before assembly to ensure a clean, secure connection.

Technical Specifications

• Material: Galvanized Steel
• Trade Size: 4 inches
• Length: 4 inches
• Conduit Type Compatibility: Rigid Metal Conduit (RMC), Intermediate Metal Conduit (IMC)
• Listing: UL Listed
• UPC: 751338320505

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: N-400400